Hydrogen Atom Distribution Functions & Radial Probability Density Questions

I’m working on a chemistry multi-part question and need guidance to help me study.

The graphs below represent some radial probability density and some radial distribution functions of the hydrogen atom:

1. Which graph represents the radial distribution function of the hydrogen 3s orbital? [ Select ] [“E“, “A“, “C“, “D“, “B“, “F“, “None of the graphs“]

2. Which statement about the radial distribution function is correct? [ Select ] [“The radial distribution function gives the total probability of finding the electron in a spherical shell at a distance from the nucleus“, “The radial distribution function does not have physical meaning“, “The radial distribution function can change its phase along the x-axis“]

3. What is the main difference between the radial distribution function and the radial probability density for the 1s orbital? [ Select ] [“The value of the functions close to the nucleus“, “The radial distribution function is normalized“, “The number of nodes“]